Thanks! I decided to just bring a picture to the petstore they also said it was a fungus and to put the fish in a smaller tank to treat I can't remember the name of the stuff but it is green powder

If people are interested about it incase they might see it I'll post up the name after the treatment is done to tell if it worked

Thanks again!Posted via Mobile Device

The disease is a form of fungus which is a bacterial disease if the molly was in the original tank it would also have the disease (pathogen) in that tank as well. Just because you move the infected fish the disease can still be in your aquarium in regards to any pathogen. The disease can spread throughout the environment to any other tank inhabitant. They may not get the disease but the pathogen will still be present in your aquarium.

Quarantine tanks should be set up for any new addition to any new tank with maybe one or two additions to the tank eventually.

True fungus is very rare. It will take an untreated injury for the fungus to start growing on it otherwise it would not have happened. This does look like true fungus. Unfortunately, most of the meds intended for fungus may not work for the true fungus as both bacterial and fungal infections have often been confused.

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